Carbon-feeding device.



Nu. 693,495. Patented Feb. l8, I902.

' c. E. CHAPIN & w. E. PATcHm;

CARBON FEEDING DEVICE.

'- (Application filed. May 4, 1901.)

(No Model.)

NV R e E L%%% Q; I I

WITNESSES: .MJM W- ATTORNEY UNITED STATES PATENT I ()EEicE.

CHARLES E. CHAPIN, OF GREENWICH, AND WALTER E. PATCHIN, OF

BRIDGEPORT, CONNECTICUT; S CHAPIN.

CARBON-FEE AID PATCHIN ASSIGNOR TO SAID DING DEV-ICE.

SPEGIFIGATION forming part of Letters Patent No. 693,495, dated February 18, 1902.

Application filed May 4, 1901 Lib all whom it nut/y concern:

Be it known that we, CHARLES E. CHA PIN, residing at Greenwich, and WALTER E. PATCHIN, residing at Bridgeport, Connecticut, citizens of the United States, have invented certain new and useful Improvements in Carbon-Feeding Devices, of which thefollowing is a clear, full, andexact description.

Our invention relates to a feeding device for a carbon in an arc-lamp; and our object; is to provide a device which will be simple and positive in its-action and which will feed the carbon steadily and smoothly. Other advantages will be apparent from the following description and accompanying drawings, which show the preferred embodiment of our invention, and the invention will be defined in the claims.

In the drawings, Figure 1 shows a side elevation of our device, parts being in section.- Fig. 2 is a diagram showing the electric connections, and Figs. 3 and 4: show details.

In many of the feeding devices of the prior art the carbon is not fed smoothly or steadily. The clu tching devices are not accurate in their operation and the rod often binds in the guideway, particularly if it is slightly too large, and the arc is consequently irregular. It has been our object to obtain a device which will avoid theseobjections,.and in the present embodiment we have provided a roller and means to automatically move the roller away from the rod to release the latter and allow it to move when the arc is broken and toward said rod to hold the same when the circuit is closed.

In the preferred embodiment of our invention shown in the drawings, A is the floor of the lamp, having an opening therein through which passes the carbon-rod B. By carbonrod or rod we mean to include both the carbon itself .and a rod to which the carbon may be attached, and we do not intend by either of .those expressions to limit ourselves to the use of either alone or to both together, as by our invention we can feed the bare carbon or a rod to which the carbon itself may be attached with substantially equal ease.

O is a roller, preferably concave, as shown in Fig. 4, which is movable laterally of rod B to hold or release the rod. We preferably also have a second concave roller D. These Serial No. 58,712. (No model.)

two rollers hold rod B between them, and thus form a gnideway for the rod. The roller 0 is preferably'carried by an arm E, pivoted to a roller-frame F. Roller D is preferably pivoted so that it is not movablelaterallyof the rod.

In order to move the roller'C into engagement with rod B, we have in this embodiment provided a lever G, which may be pivoted at g to a part of the frame and weighted, so that it will normally drop to the position shown in full lines in Fig. 1, and a connection between the lever and arm E, including a link H, pivoted to arm E and to a head I. In order to adjust the parts, we may have a screw-threaded end 7;, passing through the light end of lever G, upon which turns a thumb-nut K.

The carbon-rod B preferably moves downward toward the substantially stationary lower carbon under the influence of gravity acting on the rod itself when released, as is common in such devices, and in order to move the roller 0 away from the rod to release the same we have in the embodiment shown provided a solenoid S in a shunt of comparatively high resistance around the are, as seen in Fig. 2, so that when the arc-circuit is opened for instance, by the breaking of the are by the too great separation of the carbon pointsthe solenoid will be energized and will draw upward its core T, carried on the end of lever G, thus throwing the parts into the dotted position in Fig. 1 and releasing the rod 13.

We preferably make the rollers C and D also movable longitudinally of rod B. In the present embodiment the roller-frame F is not fixed with relation to the floor A of the lamp, but tends to drop down on the same. When the lever G isdrawn upward by the solenoid into the dotted position, the frame F will drop down onto the floor A, and when the arc-circuit is closed the solenoid will be deenergized and the lever G will drop, thus rocking arm E, and the rod 13 will be grasped and held between rollers C and D, and a further movement of lever G to its normal position will raise frame F and the rod B bodily upward together to the position shown in Fig. 1, thus separating the carbon points and allowing the arc to form. The amount of separation may be controlled by thumb-nut K.

rod B is the carbon itself or not, and the rod can freely pass through without binding, even if it is larger than the normal size, and it will be securely held even if of a smaller size.

It will be obvious and we are aware that many changes may be made in the embodiment illustrated and described without departing from our invention, and we therefore do not desire to be limited to the construction herein disclosed.

What We claim is 1. In a carbon-feeding device in combination, a carbon rod movable downward by gravity, a guideway for the same includinga plurality of rollers adapted to hold said rod between them and being movable longitudinally of the same, one of said rollers being carried on a pivoted elbow-lever whereby the same is movable laterally of said rod to release the same when the arc-circuit is opened, an overweighted lever connected to said arm and adapted 'to fall by its own weight and move said roller into engagement with said rod to hold and also raise the same, and an electromagnet in a shunt around the are adapted to raise said lever when the arc-circuit is opened and move said roller away from said rod to release said rod and allow the same to fall.

2. In an arc-lamp carbon-feeding device in combination a carbon-rod, a holder for the same through which said rod passes loosely, said holder being movable up and down with said rod, an elbow-lever pivoted to said holder and carrying a roller pivoted on one of its arms, an overweighted pivoted lever connected with the other arm of said elbow-lever and adapted to fall by its own weight and cause said roller to clutch said rod and raise said holder and rod, and an electromagnet in shunt around the arc and adapted to raise said weighted lever and release said clutch when said are is broken.

3. In an arc-lamp carbon-feeding devicein combination a carbon-rod, a holder for the same through which said rod passes loosely, said holder being movable up and down with said rod, an elbow-lever pivoted to said holder and having an upwardly-projecting arm, a roller pivoted on said arm, an overweighted pivoted lever connected with the other arm of said elbow-lever and adapted to fall byits own weight and rock said elbow-lever and thereby cause said roller to clutch said rod and raise said holder and rod, and an electromagnet in shunt around the are and adapted to raise said weighted lever and release said clutch when said are is broken.

4. In an arc-lamp carbon-feeding device in combination a carbon-rod, a holder for the same through which said rod passes loosely, said holder being movable up and down with said rod, an elbow-lever pivoted to said holder and having an upwardly-projecting arm carrying a roller pivoted thereon, a stationary roller also carried on said holder, said rod beinglocated between said two rollers, an overweighted pivoted lever connected with the other arm of said elbow-lever and adapted to fall'by its own weight and cause said roller to clutch said rod between said two rollers and raise said holder and rod, and an electromagnet in shunt around the arc and adapted to raise said weighted lever and release said clutch when said are is broken.

5. In an arc-lamp carbon-feeding device in combination a carbon-rod, a holder for the same through which said rod passes loosely, said holder being movable up and down with said rod, a lever pivoted to said holder and carrying a roller, an overweighted pivoted lever connected with one arm of said first lever by a longitudinally-adjustable connection and adapted to fall by its own weight I and cause said holder to clutch said rod and raise said holder and rod, and an electromagnet in shunt around the arc and adapted to raise said Weighted lever and release said clutch when said are is broken.

Signed at Bridgeport, Connecticut, this 3d day of January, 1901.

CHARLES E. OIIAPIN. WVALTER E. PATOIIIN. lVitnesses:

CHAS. I-I. WOLFE, RUTH S. DE WOLFE. 

